Automobile-jack.



W. D. PATTERSON, JR.

AUTOMOBILE JACK.

APPLICATION FILED AuG.2s. 1914.

Patented Feb. 1, 1916.

wif/Incom WILLIAM-fn. PATTERSON, JR., or MAaYsvILLE, KANSAS.

AUTOMOBILE-JACK Application filed August 28, 1914. Serial No. 859,110.

To MZ Iwhom it may concern.'

Be it known that I, VILLIAM D. PATTER- soN, Jr., a citizen of the United States, residing at yMarysville, in the county of Marshall and State of Kansas, have invented certain new and useful Improvements in i-\utomobile-Jacks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such-as will enable others skilled in the `art to whigh it appertains to make andv .use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates tonew and useful improvements in 'lifting jacks, designed especially for use upon automobiles and other vehicles and the object in view is to produce a simple and efficient device of this nature, consisting of a pneumatic piston with a plunger, the stem of which has a foot for engagement with the ground andl affording means, vwhen compressed air is applied to the cylinder, the latter, which is designed to be fastened to thevehicle, may cause the same to be elevated.

My invention comprises various details of construction, combinations and arrangements of parts which will be hereinafterv Afully described, shown in the accompanying drawings and then specifically defined in the appended claim.

I illustrate my invention in the4 accompanying drawings, in which:

Figure 1 is a top plan view, showing the application of my invention. Fig. 2 isan end elevation, and Fig. 8 is an enlarged de tail sectional view throughl the pneumatic cylinder.

Reference now being had to the details of the drawings by letter, Av designates the frame of an automobile upon which .is'

mounted "a tank B adapted to contain air under pressure, and pipes C lead therefrom to the rear and forward axles where each communicates with an aperture in the upper end-of the pneumatic cylinderD. A piston E is mounted within each cylinder and a spring F bears between the lower end and said piston and serves to return the piston to its normal position after the air has been Specification ofLetters Patent.

Patented-Feb. 1, 1ere.

released from the cylinder. A stem'H is fixed to the piston and moves through an .aperture in the-bottom of the cylinder and has a foot K 'secured to its lower end, ad-apted'to rest upon the ground or floor.

When it is desired to hold the jack in an elevated position for any length of time, independent of the pneumatic means, I provide a pawl N which is pivotally mounted in the cylinder and which may be thrown into engagement with thestem of the piston to hold the automobile in an elevated position.

' When said pawl is not in use, it may be swung out of engagement with the piston rod to allow the latter to be acted upon by pneumtaic pressure.

In the drawings I have shown four jacks,

secured two to the forward and two to the rear axle. Pipes O project'from the tank and are adapted to have valve-regulated exit openings for the purpose of inflating the tires from the supply of air lwithin the tank.`

In operation, the air is allowed to pass to the jacks by opening the valves in the pipes and allowing the compressed air to cause the cylinder to move against the'tension of the spring, thereby elevating the vehicle from' the ground. When the air is released from thecylinder, the spring will tend to normally return the pistons to theirs'tarting position.

YVhat I claim to be new is:

A lifting jack for automobiles comprising, in combination with a cylinder adapted to be attached to a vehicle frame, a piston mounted within the cylinder, a stem secured to the underfsurface of the piston and eX- tending through an aperture in the bottom thereof,l a foot upon the lower end of the piston stem, a cap fitted over the upper end of the `,cylinder and having an inlet pipe 

